The Fair-Rite 6678322121 is a high-quality Toroid Core, manufactured using Fair-Rite's 78 material. Supreme Components International is an authorised distributor of Fair-Rite products, ensuring you receive a genuine and reliable component. This ferrite core is designed for a wide range of applications, including inductors, transformers, and noise filters. Its toroidal shape provides excellent magnetic properties and minimizes electromagnetic interference. The 78 material offers a specific permeability and frequency response, making it suitable for demanding applications. Trust Supreme Components International for all your electronic component needs.